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Chapter 4: Q. 4.83 (page 156)

In this section we introduced a descriptive measure of the utility of the regression equation for making predictions.

a. Identify the term and symbol for the descriptive measure.

b. Provide an interpretation.

Short Answer

Expert verified

Part (a) Term is co-efficient of determination and symbol is r2

Part (b) Can be interpreted as the percentage in the variability

Step by step solution

01

Step 1. Given inormation

We are doing descriptive measure for prediction.

02

Part (a) Step 1. Term and symbol

The coefficient of determination r2is a descriptive measure of the utility of the regression equation for generating predictions.

03

Part (b) Step 1. interpretation

It is defined as the fraction of the variance in y that is explained by the linear regression relationship between the variables x&y.

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